Staging - Public Room Timeline

	Staging	400 Members
	Staging merges \| Running staging cycles: https://github.com/NixOS/nixpkgs/pulls?q=is%3Apr+is%3Aopen+head%3Astaging-next+head%3Astaging-next-25.11 \| Review Reports: https://malob.github.io/nix-review-tools-reports/	131 Servers

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Sender	Message	Time
30 Jun 2026
ElvishJerricco	wild	15:20:34
ElvishJerricco	So I guess that means it's different for the other install-like commands	15:21:47
ElvishJerricco	which I think don't matter?	15:22:04
ElvishJerricco	K900: You wanna try to make the change? I doubt I'll have time today	15:23:47
K900	No	15:23:56
K900	Migraine	15:23:58
	spermoedik joined the room.	15:24:09
ElvishJerricco	fair. I'll forward the info to https://matrix.to/#/!SsuQHVzf59iBgk6YIm:0upti.me?via=nixos.org&via=matrix.org&via=tchncs.de in case anyone else wants to give it a try	15:25:42
K900	Paperless bisect is on hold	16:27:24
K900	Due to Plasma 6.7.2	16:27:31
K900	https://blog.rust-lang.org/2026/06/30/Rust-1.96.1/	16:39:15
K900	Miscompilation	16:39:18
K900	Spoopy	16:39:20
debtquity	were there any changes to c compiler version recently?	17:05:58
debtquity	i observe issue with `cmakeFlags` not propagating to cmake/ninja build	17:06:59
K900	Which flags?	17:08:45
debtquity	I am running into strange issue with `cmakeFlags` not propagating to cmake `configurePhase` rocksdb> cmake flags: -GNinja -DCMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY=OFF -DCMAKE_FIND_USE_PACKAGE_REGISTRY=OFF -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON -DCMAKE_BUILD_TYPE=Release -DBUILD_TESTING=OFF -DCMAKE_INSTALL_LOCALEDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/share/locale -DCMAKE_INSTALL_LIBEXECDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/libexec -DCMAKE_INSTALL_LIBDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/lib -DCMAKE_INSTALL_DOCDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/share/doc/rocksdb -DCMAKE_INSTALL_INFODIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/share/info -DCMAKE_INSTALL_MANDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/share/man -DCMAKE_INSTALL_INCLUDEDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/include -DCMAKE_INSTALL_SBINDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/sbin -DCMAKE_INSTALL_BINDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocks https://github.com/debtquity/nixpkgs-review-gha/actions/runs/28461253865/job/84349445690#step:6:5588 but this is missing all of the flags defined in `cmakeFlags`: https://github.com/NixOS/nixpkgs/pull/537105/changes#diff-f169fc685573d8eaee885af02b69ba1a718da48f3a9ae1ee4bb64ca67cadef28R62-R82 I looked back at a hydra build for same package, but those flags are there: https://hydra.nixos.org/build/328605767/nixlog/1 only diff i can see is: -- The CXX compiler identification is Clang 21.1.8 -- The C compiler identification is Clang 21.1.8 vs -- The CXX compiler identification is GNU 15.2.0 -- The C compiler identification is GNU 15.2.0	17:09:29
debtquity	K900: all of them, it seems	17:09:42
K900	What does "propagating" even mean here	17:10:44
debtquity	`"-DWITH_GFLAGS=0"` doesn't show up in configurePhase	17:12:16
debtquity	(but really it's all of them	17:12:29
K900	What does "doesn't show up in configurePhase" even mean	17:12:44
debtquity	rocksdb> cmake flags: -GNinja -DCMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY=OFF -DCMAKE_FIND_USE_PACKAGE_REGISTRY=OFF -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON -DCMAKE_BUILD_TYPE=Release -DBUILD_TESTING=OFF -DCMAKE_INSTALL_LOCALEDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/share/locale -DCMAKE_INSTALL_LIBEXECDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/libexec -DCMAKE_INSTALL_LIBDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/lib -DCMAKE_INSTALL_DOCDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/share/doc/rocksdb -DCMAKE_INSTALL_INFODIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/share/info -DCMAKE_INSTALL_MANDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/share/man -DCMAKE_INSTALL_INCLUDEDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/include -DCMAKE_INSTALL_SBINDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/sbin -DCMAKE_INSTALL_BINDIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/bin -DCMAKE_INSTALL_NAME_DIR=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1/lib -DCMAKE_STRIP=/nix/store/xcnqqnhw9hb4j5rjgds2yjryi8qki5f3-gcc-wrapper-15.2.0/bin/strip -DCMAKE_RANLIB=/nix/store/xcnqqnhw9hb4j5rjgds2yjryi8qki5f3-gcc-wrapper-15.2.0/bin/ranlib -DCMAKE_AR=/nix/store/xcnqqnhw9hb4j5rjgds2yjryi8qki5f3-gcc-wrapper-15.2.0/bin/ar -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DCMAKE_INSTALL_PREFIX=/nix/store/sl8939n8g5b2wdm508a7zzlmg4jawrj5-rocksdb-10.10.1	17:13:29
Lach	rustc packaged at staging-next expects llvm to be built with this fix: https://github.com/rust-lang/llvm-project/commit/94e2c19f86a699d7a19ff0f4130b696699189c8d It is included in official release of rustc 1.96, but is missing from nixpkgs rustc 1.96 as it is using system llvm without this fix Simple reproducer I found is: `use std::arch::x86_64::{_mm512_dpbusd_epi32,__m512i}; #[target_feature(enable = "avx512vnni")] pub unsafe fn dp(a:__m512i,b:__m512i,c:__m512i)->__m512i{_mm512_dpbusd_epi32(a, b, c)}` You can build this code on godbolt's rustc 1.96/with oxalica's rust-overlay, but nixpkgs rustc fails to build it with "rustc-LLVM ERROR: Cannot select: intrinsic %llvm.x86.avx512.vpdpbusd.512" error	17:25:39
K900	Do we care about AVX512	17:26:13
Lach	It breaks packages which use runtime feature selection for it	17:26:40
K900	Ugh	17:26:45
K900	But we don't want to eat an LLVM rebuild for this probably	17:26:53
K900	But we might want to eat a rustc rebuild for the 1.96.1 miscompilation	17:27:11
Lach	E.g postgresqlPackages.vectorchord	17:27:18

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